In 2371, USS Voyager's EMH. discovered that Seska's blood chemistry was not consistent with that of a Bajoran. Her cover story was that she suffered from Orkett's disease as a child during the Occupation of Bajor, and that she had received a bone marrow transplant from a Cardassian woman named Kattell, however, The Doctor had considered and dismissed that explanation before she even brought it up, as it could not sufficiently explain her genetic markers. (VOY: "State of Flux")